IBM x3250 M3 Problem Determination And Service Manual page 198

CAUTION:
Never remove the cover on a power supply or any part that has the following
label attached.
Hazardous voltage, current, and energy levels are present inside any
component that has this label attached. There are no serviceable parts inside
these components. If you suspect a problem with one of these parts, contact
a service technician.
To remove the power supply, complete the following steps.
1. Read the safety information that begins on page vii and "Installation guidelines"
2. Disconnect the ac power cord from the connector on the power supply.
3. Remove the server from the rack and remove the cover (see "Removing the
4. Remove the air baffle (see "Removing the DIMM air baffle" on page 132).
5. Disconnect the power-supply cables from the connectors on the system board
6. Remove the screw that holds the power supply to the rear of the chassis.
7. Loosen the captive thumbscrew that secures the rear of the power supply to the
180
IBM System x3250 M3 Types 4251, 4252, and 4261: Problem Determination and Service Guide
Captive screw
on page 127.
Disconnect all external cables from the server.
cover" on page 130).
Attention: To ensure proper cooling and airflow, do not operate the server for
more than 30 minutes with the cover removed.
and internal devices; then, disengage the cables from any retention-clips.
Note: Note the routing of all power-supply cables; you will route the
power-supply cables the same way when you install the power supply.
chassis bottom.
Power supply
Rear screw